[CentOS] Centos 6 - disabling IPv6 addressing

[Ryan Wagoner]

On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz <rgm at htt-consult.com>
wrote:

>
>
> On 03/06/2015 11:00 AM, Robert Moskowitz wrote:
>
>>
>>
>> On 03/06/2015 10:55 AM, Barry Brimer wrote:
>>
>>>
>>>
>>>  IPV6INIT="no"
>>>>
>>>> But I am still getting a global IPv6 (and of course local scope).
>>>>
>>>> What else do I need to do to disable the listening for RA announcements
>>>>
>>>> and setting an IPv6 global address?  I do not want to reboot the box.
>>>>
>>> There are other modules, most notably bonding that rely on the ipv6
>>> module being loaded. What I do is place "options ipv6 disable=1" in
>>> "/etc/modprobe.d/ipv6.conf". That does require a reboot, which I know you
>>> are looking to avoid, so you may want to try other methods to remove your
>>> address in the running configuration.
>>>
>>
>> 'All' I need is for the system not to have a global IPv6 address. Then it
>> will not try to connect to other global IPv6 systems which will reject the
>> connection, as the IPv6 rDNS cannot be set, given it is a dynamic IPv6
>> assigned address from the ISP.
>>
>
> I tried:
>
> # cat /etc/sysconfig/network
> NETWORKING=yes
> HOSTNAME=z9m9z.htt-consult.com
> NETWORKING_IPV6=no
> IPV6INIT=no
>
>
> and 'service network restart' but still showing IPv6 addressing.



I would try adding the below line to /etc/sysconfig/network.

IPV6_AUTOCONF=no

Ryan